Morphological instability in freezing colloidal suspensions

Morphological instability in freezing colloidal suspensions

We present a linear stability analysis of a planar ice interface during unidirectional solidification of a hard-sphere colloidal suspension. We find that the interface can become unstable due to constitutional supercooling, yielding a new mechanism for pattern formation in colloidal systems. The int...

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Bibliographic Details
Published in:Proceedings of the Royal Society. A, Mathematical, physical, and engineering sciences Vol. 463; no. 2079; pp. 723 - 733
Main Authors: Peppin, Stephen S.L, Worster, M. Grae, Wettlaufer, J.S
Format: Journal Article
Language:English
Published: London The Royal Society 08-03-2007
Subjects:
Colloidal Suspensions
Linear Stability
Solidification
Online Access:Get full text
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Summary:We present a linear stability analysis of a planar ice interface during unidirectional solidification of a hard-sphere colloidal suspension. We find that the interface can become unstable due to constitutional supercooling, yielding a new mechanism for pattern formation in colloidal systems. The interfacial stability is shown to depend strongly on the size and concentration of the particles. Increasing the particle radius tends to stabilize the interface, while increasing the concentration has a destabilizing effect. Additional effects that may influence the stability and morphology of such a system are described.
Bibliography:ark:/67375/V84-LVPTHP0G-D
ArticleID:rspa20061790
istex:838CAB73523A14DEE75FE416997BDFEAD2C07E7A
href:723.pdf
ISSN:1364-5021
1471-2946
DOI:10.1098/rspa.2006.1790